Mathieu is finding the x-intercepts of the function f(x) = x2 + 4x + 3. His work is shown below

Mathematics

2 answers:

Alex_Xolod [135]3 years ago

7 0

Answer:

I can't see Mathieu's work but I will show the right steps and maybe you can find where Mathieu went wrong.

f(x)=x^2+4x+3

f(x)=(x+3)(x+1) Since 3*1=3 and 3+1=4

The x-intercepts can be found by setting y to 0 and solving for x

(in other words replace that f(x) thing with 0 and solve for x)

0=(x+3)(x+1)

Now set both factors equal to 0

x+3=0 or x+1=0

x =-3 x=-1

The x-intercepts are at (-3,0) and (-1,0)

Xelga [282]3 years ago

5 0

Answer:

The answer is C

Step-by-step explanation:

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Lisa [10]

Answer:

degree measure of arc AB = 120°

length of arc AB = 40π/3 in.

Step-by-step explanation:

arc AB has the same measure as its central angle. So, arc AB = 120°

120 is 1/3 of 360, Therefore, the length of arc AB is 1/3 of the circumference.

Therefore, the

length of arc AB = 1/3πd = 1/3π(40) =

= 40π/3 in.

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andrew11 [14]

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